import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from "../components/Home.vue"
import Welcome from "../components/Welcome.vue"
import Users from "../components/Users/Users.vue"
import Rights from "../components/power/Rights.vue"
import Roles from "../components/power/Roles.vue"
import Cate from "../components/goods/Cate.vue"

Vue.use(VueRouter)

const routes = [{
    path: '/',
    redirect: '/home' /* 重定向根页面也就是默认页 */
  },
  {
    path: '/login',
    component: Login
  },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children: [{
        path: '/welcome',
        component: Welcome,
      },
      {
        path: '/users',
        component: Users,
      },
      {
        path: '/rights',
        component: Rights
      },
      {
        path: '/roles',
        component: Roles
      },
      {
        path: '/categories',
        component: Cate
      },
    ]
  }
]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫,to表示将要访问的路径，from表示从哪里来，next是下一个要做的操作 next('/login')强制跳转login
router.beforeEach((to, from, next) => { //to将要访问的路径  from代表从哪个路径跳转而来  next是一个函数，表示放行 next() 放行 next('/login') 强制跳转
  // 访问登录页，放行
  if (to.path === '/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  // 没有token, 强制跳转到登录页
  if (!tokenStr) return next('/login')
  next()
})

export default router
